Americans first became worried about a class divide in the late 19th century, when the so-called robber barons amassed huge fortunes while immigrants toiled in sweatshops.

• 美国人最早对阶层区分感到担忧是在19世纪末。当时，所谓的强盗资本家聚集了巨额财富，而移民却在血汗工厂辛勤劳动。